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Area Converter Calculator

Convert nonnegative area values among metric, international-foot-based, acre, hectare, and square-inch units.

Published

Converted area

Result
10.76391 ft²
Square Kilometers (km²)
0.000001
Square Yards (yd²)
1.19599
Square Miles (mi²)
0
Acres (ac)
0.000247
Enter a numeric value to convert between area units.

Results update as you type.

Worked example

value: 850 · fromUnit: square-feet · toUnit: square-meters

Result: 78.967584 m²

Try it →

Area Converter Calculator

Choose source and target units. Every conversion passes through square meters using defined length relationships squared.

Factors in square meters

UnitExact dimensional factor
square inch0.0254²
square foot0.3048² = 0.09290304
square yard(3 × 0.3048)² = 0.83612736
square mile(5,280 × 0.3048)² = 2,589,988.110336
acre43,560 × 0.3048² = 4,046.8564224
hectare10,000
square kilometer1,000,000

target=value×source factortarget factor\text{target}=\frac{\text{value}\times\text{source factor}}{\text{target factor}}

For example, 850 ft² is 850 × 0.09290304 = 78.967584 m². Results are rounded only after conversion. Negative areas, unknown units, invalid numeric inputs, and conversions with results too large to represent are rejected.

For related area conversions, use the acres to square feet converter, the square feet to square meters calculator, or the hectares to acres converter.

Sources

Compare Area Converter Calculator with related tools

All comparisons →
Acreage vs Area Converter CalculatorCompare acreage and area converter: one computes acres from measured side lengths, the other restates a known area in other units — and when to use each for land records.Circle vs Area Converter CalculatorCompare circle and area converter: one derives radius, diameter, circumference, and area from any one positive circle measurement, the other restates a known area among square inches, square feet, acres, hectares, and metric units.

Frequently asked questions

What arithmetic does this calculator use?
The method and defining factors are shown on the page. Arithmetic retains the full factor and rounds only the display.
What inputs are rejected?
Negative or invalid numeric inputs, unknown unit selections, and values whose results are too large are rejected.

Sources

  • NIST-SP811

    primary · Aug 11, 2026

    Supports: SP 811 conversion guidance supporting the SI square-meter basis and the exact international foot of 0.3048 m behind the squared length factors.

  • NIST-HB44-APPC

    primary · Aug 11, 2026

    Supports: Handbook 44 Appendix C customary-unit tables backing the 43,560 square feet per acre relationship and the acre and square-inch dimensional factors.

Related calculators

Square Feet ConverterConvert square feet to square meters, square yards, square inches, acres, and hectares with squared-factor guidance for rooms, lots, and materials.Square Meter ConverterConvert square meters into square feet, square yards, square centimeters, acres, and hectares with squared-factor explanations and land-area examples.Land Area CalculatorCalculate rectangular land area from length and width, then compare acres, hectares, square feet, and square meters for land records.Square Feet to Acres CalculatorConvert square feet to acres for lots, zoning, surveys, site plans, and land comparisons using 43,560 sq ft per acre.Square Feet to Square Meters CalculatorConvert square feet to square meters with the exact squared foot-to-meter factor, examples for floor plans and real estate, and a reference table.Square Yard ConverterConvert square yards to square feet, square meters, square inches, and acres with squared yard factors for flooring, turf, fabric, and land estimates.

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